Psychometric properties of an Arabic translation of the Nine Item Avoidant/Restrictive Food Intake Disorder Screen (NIAS) in a community sample of adults

Table 2 Measurement invariance of the ARFID across sex and body mass index in the total sample

Model	χ²	Df	CFI	RMSEA	SRMR	Model comparison	Δχ²	ΔCFI	ΔRMSEA	ΔSRMR	Δdf	p
Model 1: Invariance by sex
Configural	107.62	48	.974	.049	.051
Metric	113.34	54	.974	.046	.057	Configural versus metric	5.72	< .001	.003	.006	6	.455
Scalar	118.16	61	.975	.043	.059	Metric versus scalar	4.82	.001	.003	.002	7	.682
Model 2: Invariance by body mass index
Configural	132.27	48	.964	.059	.042
Metric	142.41	54	.962	.056	.041	Configural versus metric	10.14	.002	.003	.001	6	.118
Scalar	145.26	61	.964	.052	.042	Metric versus scalar	2.85	.002	.004	.001	7	.898

CFI comparative fit index, RMSEA Steiger-Lind root mean square error of approximation, SRMR standardised root mean square residual

ISSN: 2050-2974